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以下代码（使用用于图像处理的openCV -libraries 以Java编写）生成MatOfDMatch类的输出。问题是我不明白数组中的值告诉我关于匹配的内容：

FeatureDetector fastFeatureDetector = FeatureDetector
    .create(FeatureDetector.FAST);
DescriptorExtractor surfDescriptorExtractor = DescriptorExtractor
    .create(DescriptorExtractor.SURF); 
DescriptorMatcher flannDescriptorMatcher = DescriptorMatcher
    .create(DescriptorMatcher.FLANNBASED);

Mat image1 = Highgui.imread(myPicPath);
Mat image2 = Highgui.imread(myPicPath2);

ArrayList<MatOfKeyPoint> keypoints1 = new ArrayList<MatOfKeyPoint>();
    keypoints1.add(new MatOfKeyPoint());
ArrayList<MatOfKeyPoint> keypoints2 = new ArrayList<MatOfKeyPoint>();
    keypoints2.add(new MatOfKeyPoint());

fastFeatureDetector.detect(image1, keypoints1.get(0));
fastFeatureDetector.detect(image2, keypoints2.get(0));

Mat descriptor1 = new Mat();
Mat descriptor2 = new Mat();

surfDescriptorExtractor.compute(image1, keypoints1.get(0),
    descriptor1);
surfDescriptorExtractor.compute(image2, keypoints2.get(0),
    descriptor2);

ArrayList<MatOfDMatch> matches = new ArrayList<MatOfDMatch>();
matches.add(new MatOfDMatch());

flannDescriptorMatcher.match(descriptor1,
    descriptor2, matches.get(0));

Mat outImg = new Mat();
Features2d.drawMatches(image1, keypoints1.get(0), image2,
        keypoints2.get(0), matches.get(0), outImg,
        new Scalar(0, 255, 0), new Scalar(0, 0, 255), new MatOfByte(),
        Features2d.NOT_DRAW_SINGLE_POINTS);

Highgui.imwrite(myOutpuPicPath,
            outImg);

//The following code part is not part of the Matching process (which is above part), 
//I include it here because it prints the MatOfDMatchvalues in a readable fashion
ArrayList<Double> matchChannel_0 = new ArrayList<Double>();
ArrayList<Double> matchChannel_1 = new ArrayList<Double>();
ArrayList<Double> matchChannel_2 = new ArrayList<Double>();
ArrayList<Double> matchChannel_3 = new ArrayList<Double>();

for (int j = 0; j < matches.get(0).size().height; j++) {
matchChannel_0.add(matches.get(0).get(j, 0)[0]);
matchChannel_1.add(matches.get(0).get(j, 0)[1]);
    matchChannel_2.add(matches.get(0).get(j, 0)[2]);
matchChannel_3.add(matches.get(0).get(j, 0)[3]);
}

System.out.println(matchChannel_0 + "\n" + matchChannel_1 + "\n"
    + matchChannel_2 + "\n" + matchChannel_3);


将image1和image2设置为相同的 pic，让所有值都matchChannel_1变为 asmatchChannel_0并且值matchChannel_3都变为 0。

将image1和image2设置为不同的图片，值就不同了。

这些值是什么意思？他们肯定要告诉一些关于比赛的事情，但我不知道究竟是什么以及如何。我需要一个答案，例如“该渠道中更大的价值意味着这个以及另一个渠道中的那个”。有人可以澄清这一点，因为本页上的 openCV 教程没有解释这一点。

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